A spaceship ferrying workers to Moon Base I takes a straight-linepath from the earth to the moon, a distance of about 384,000 km.Suppose it accelerates at 21.1m/s2 for the first 12.5 minof the trip, then travels at constant speed until the last12.5 min, when it accelerates at-21.1 m/s2, just coming torest as it reaches the moon.
(a) What is the maximum speed attained?
(b) What fraction of the total distance is traveled at constantspeed?
(c) What total time is required for the trip?